Poor fruit production might be a result of the varieties you are growing or the times of year you are planting. As a rule, tomato plants stop producing when temperatures soar above 90F. Determinate (one-crop) varieties require minimal staking (if any) and no pruning. Indeterminate (long-season) tomatoes should be staked and pruned or pinched. A single sturdy stake or a narrow cage is all you need for determinate tomatoes. Pruning is simply a matter of removing the suckers (small shoots) that appear in the leaf axils of the main shoot to create a single-stemmed plant. Some gardeners swear by pruning and others prefer to simply let the plants grow as they may. Some tomato varieties recommended for Florida include:
`Floradel' ? Fruit large red. Resistant to Fusarium wilt (1); gray leafspot; and graywall.